AL55/66 Technical manual Version 1.1
4.1.2 Parallel combinatorial (EVA standard)
Parallel combinatorial standard was introduced and proposed by EVA
7
when euro coins
where introduced in European countries. In transition period national and euro coins
coexisted and 6 output for coins where insufficient.
Vending machine controllers where reprogrammed to accept both currencies.
For details about protocol see document EVA Spec. 01.pdf.
Basically outputs are activated in combinatorial way to indicate coin that has been
accepted. In this mode output 1 (
pin 7
) is permanently active and indicate type of
validator. Output 2 (
pin 8
) is output of lowest binary weight, followed by output 3
(
pin 9
), output 4 (
pin 10
) and output 5 (
pin 3
) as output of highest binary weight.
Output 6 (
pin 4
) is parity check output. With this type it is possible to indicate
acceptance of 15 different coins. Euro coins are programmed to be on first position
beginning with 1 cent coin. Position 9 is reserved for 5 Euro coin in future use.
The last positions are used for national currencies and the very last one for user token.
4.1.3 Multi-impulse parallel
These type parallel validators are proposed also by EVA and described in same
document as previous type. One way to reduce number of coin output is to use same
output for coins of different value. In this case the relative value of two coins is 1 and 2.
Output wills be activated two times when coin with value of 2 is accepted or once if coin
of value 1 is accepted. Using that type of validator there will bee no knead to reprogram
host machines software and 6 outputs will be sufficient in most cases.
There are two modes of operation for that type of validator. Normal mode with standard
100 ms pulses and fast mode with 50 ms pulses.
4.1.4 Parallel with Spanish protocol
Parallel validators with so coled “Spanish” protocol are some times called validators
with “hand shake”
8
protocol. They are developed and introduced to market by Spanish
company AZKOYEN and that why they are called
Spanish protocol validators
.
In most cases only one input is used for blocking the acceptance there is also versions
with sorter enable/disable input.
While in stand by coin selector acceptance and sorter are inhibited. After coin has been
introduced and recognized coin selector activate short impulse on corresponding parallel
output. Time of impulse is typically 10 ms. After detecting the change host machine
must decide within time period of 10 ms ether to accept or to reject introduced coin.
If coin should be accepted, inhibition input will be deactivated by host till coin exit from
coin selector. Sorting mechanism is enabled or left disabled at same time.
After acceptance coin selector activate for second time same output as indicator that
coin has been accepted correctly. Second impulse is typically 100 ms long but could be
programmed by user to any value between 5 ms and 1000 ms.
7
E
uropean
V
ending
A
ssociation
8
This stands for interaction of host and coin selector to achieve control of acceptance and sorting of
coins.
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